86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* Copyright (c) 2022 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <dlfcn.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/prctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <link.h>
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#if defined (__arm__)
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#define ASAN_LINKER "/lib/ld-musl-arm-asan.so.1"
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#define LIB "/lib/"
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#elif defined (__aarch64__)
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#define ASAN_LINKER "/lib/ld-musl-aarch64-asan.so.1"
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#define LIB "/lib64/"
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#else
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#error "unsupported arch"
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#endif
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static int g_isAsan = false;
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static int dl_iterate_phdr_callback(struct dl_phdr_info *info, size_t size, void *args)
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{
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return info && info->dlpi_name && (strcmp(info->dlpi_name, ASAN_LINKER) == 0);
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}
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static void __attribute__((constructor)) init(void)
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{
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g_isAsan = dl_iterate_phdr(dl_iterate_phdr_callback, NULL);
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}
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typedef void* (*dlopen_fn_t)(const char *file, int mode);
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static void *trap_dlopen(const char *file, int mode);
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static dlopen_fn_t real_dlopen = trap_dlopen;
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static void *trap_dlopen(const char *file, int mode)
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{
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dlopen_fn_t fn = dlsym(RTLD_NEXT, "dlopen");
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if (fn) {
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real_dlopen = fn;
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return fn(file, mode);
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}
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abort();
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}
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void *dlopen(const char *file, int mode)
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{
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while (g_isAsan && file != NULL) {
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char *p = strstr(file, LIB);
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if (p == NULL) {
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break;
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}
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char *f = NULL;
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asprintf(&f, "%.*s/asan%s", (int)(p - file), file, p);
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if (f == NULL) {
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break;
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}
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void *ret = real_dlopen(f, mode);
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free(f);
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f = NULL;
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if (ret != NULL) {
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return ret;
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}
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break;
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}
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return real_dlopen(file, mode);
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}
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